Crossword Genius

Coming from church, what might Rosemary say confidently to Herb? (9)

Ross

I believe the answer is:

basilican

I'm a little stuck... Click here to teach me more about this clue!

'coming' is the definition.
Although both the answer and definition are adjectives, I cannot understand how they can define each other.

'church what might rosemary say confidently to herb?' is the wordplay.
I cannot quite see how this works, but
'church' could be 'basilica' (basilica is a kind of church) and 'basilica' is located in the answer.
A single letter 'n' remains which might be clued in a way I don't see.
This explanation may well be incorrect...

'from' is the link.

Can you help me to learn more?

(Other definitions for basilican that I've seen before include "Like ecclesiastical building" , "building of church" , "old Roman building" , "Like court in Rome" , "Temple" .)

I've seen this clue in The Telegraph.
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